OEM Carrier Start Capacitor 88-108 MFD 330V for Model PH4RNG018000BBAA

This OEM start capacitor is the factory-specified replacement for the Carrier PH4RNG018000BBAA heat pump system. The start capacitor delivers the high-voltage surge of energy required to bring the compressor up to operating speed during each cooling or heating cycle. When this component fails, the compressor may hum and attempt to start but ultimately fail to turn on — leading to a complete loss of heating or cooling. A failed start capacitor is one of the most common causes of compressor lockout and should be inspected any time the system runs but produces no conditioned air.

• Specs: 88–108 MFD (microfarad) range | 330V rated | Round case, 2.06" diameter × 4.37" height | Includes bleed resistor | OEM Part# P281-8806
• OEM vs Generic: This is a genuine OEM Carrier capacitor sourced directly from the factory-authorized supply chain. OEM capacitors are manufactured to exact MFD tolerance specifications, ensuring reliable compressor starts and extended component life. Generic alternatives often carry wider tolerances that accelerate motor and compressor wear over time.
• Install difficulty: 2/5 — Always discharge the capacitor fully before handling. Photograph or label all wiring connections before disconnecting. Tools needed: 1/4" nut driver, needle-nose pliers, and a multimeter to verify capacitance before and after installation. Turn off power at the disconnect and breaker before beginning work.
• Warranty: 1-year OEM factory warranty against defects. Orders received by 3PM ship same business day from our stocked warehouse.

Compatibility: Designed for the Carrier PH4RNG018000BBAA heat pump. Cross-reference part numbers include: P281-8806, 1017H, 092A088B330CE7X, 88-108UF, and 1403H. Always verify the MFD range and voltage rating on your unit's data plate before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — no guesswork required.